**Linus was catching snowflakes on his tongue and said they needed what

16.

He presented a method for measuring relative masses of atoms

17.

an issue scientists of the 1860's had was determining the ____ of new elements

18.

**who kisses Lucy during the play practice

19.

Henry Moseley was working with this scientist in 1911

22.

group 17

24.

the ability of an atom in a chemical compound to attract electrons from another atom in a compound

25.

removing electrons from an already positive ion can be done if enough ____ is added

26.

1/2 the distance between the nuclei of identical atoms bound together

27.

when elements were arranged by increasing atomic mass, there were similarities in chemical properties

29.

the total number of electrons in the HOEL of elements in the p block is equal to group number minus ___

32.

the First International Congress of Chemists was held here

33.

elements in s and p block

35.

electrons further from the nucleus are shielded from the nucleus by inner electrons

37.

synthetic group 17 element

38.

energy required to remove one electron from a neutral atom

41.

one of the three elements predicted by Mendeleev

43.

atomic numbers 90-103

44.

extremely reactive metals

46.

he developed a scale of numerical values to reflect the tendancy for an atom to attract electrons

48.

he wrote a textbook that organized elements according to properties

49.

He discovered that helium is found on earth

51.

one of the men that discovered Argon

52.

with each successive electron removed, the IE ____

54.

he discovered radon

55.

these divisions on the PT have similar properties

56.

group with the highest electron affinity

57.

anions are ___ than neutral atoms

Down

1.

value of the most electronegative element

2.

group 17, purple solid

3.

group 2

4.

**the color of Christmas tree Lucy wanted Charlie Brown to get

6.

most electronegative element

11.

one of the three elements predicted by Mendeleev

13.

actinides are all ____

14.

Atomic numbers 58-71

17.

Group 1

20.

energy change that occurs with the addition of an electron

21.

d block elements

23.

from L to R, radius ____

28.

atom or group of atoms with a charge

30.

physical and chemical properties of elements are periodic in functions of the atomic number

31.

**how much does Lucy charge for her psychiatric help

34.

halogens react with most metals to form ___

36.

In 1860, scientists had to learn the ____ of the new elements

39.

First to arrange elements on PT by atomic number

40.

outer most electrons

42.

from bottom to top, radius ____

45.

one of the noble gases discovered by Ramsay

47.

horizontal row

49.

Where was Dmitri Mendeleev from

50.

group 16 has ____ VE

53.

**what did Sally ask Santa for in the letter she had her brother Linus write for her

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